Bottle-blowing machine.



J. P. SCULL. BOTTLE BLOWING MACHINE. APPLICATION FILED DEC. 27, 1916.

1 ,285,4:20. Patented Nov. 19', 1918.

2 SHEETS-S-k'nEET l3 l mm IIIIIIHIHH INVENTOR WITNESSES J. P. SCULL.

BOTTLE BLOWING MACHINE, APPLICATION FILED 1150.27, 1916.

m mm.

.77 m I 15 4 WITNESSES 3 5/4/4111 "4? m 6 Patented Nov. 19, 1918'.

2 SHEE TS-SHEET 2.

INVENTOR 1 I tar, .rrro.

JAMES P. SCULL, OE MILLVILLE, NEW J a EY, ASSIGNOR TO WHITALL-TATUM $M- PfiNY, 0E MILLVILLE, NEW JEY, A COOMTION OF NEW JERSEY.

BOTTLE-BLOWING MACHINE.

nessnee.

Pat. Panel Nov. in time;

Application filed December 27, 1916. Serial N 0.1%,085.

\ in section of the blow head.

" he bottle lip and yie 1F ig. 2 is a bottom view of the blow head.

Fig. 3 is a vertical section through the blow h, and

Fig. l is a vertical section through the air valve.

The invention relates to bottle blowin machines, and particularly to an improved blow head for such machines. The object of the invention is to produce a simple blow head which will operate with minimum wear and liebility of leakage, and which is rily adjustable to operate on bottles having ditferent height of lips. The usual type of blow head for this class of machines is pro vided with a sliding bell which, in connection with the stem, act as a valve to 1.3.: or cut oil the how oi air to the bottle to be blown. it is found that these wear coinperetively rapidly and leak. The blow head of the present invention has an adjustable hell securely mounted on the s and the blow head itseli contains no valves or wearing parts to cause a leak of air. A stationary valve is mounted on the machine and is operated by the movement of the blow head to or out ch air thereto. The bell is made adjustable so that the blow head is adapted to blow bottles havi lips of any height extending above the blow mold. A cover or washer of fibrous non-heet-conduoting is brought e inst the top or ding y held agai it spring pressure so as to form a tight The present invention also relates to certain other combinations and, arrangements of parts particularly pointed out in the claims, the advantages of which will be a parent to those skilled in this art from e following description.

in which the preferred emhediment of the invention is Referring to the drawi;=

illustrated, the blow head, indicated generally by reference numeral 1,'is arranged to be moved downwardly .to blow a bottle blank or parison into a complete bottle in the blow mold 3. Anyusual form of blow mold may be employed, as will be readily understood by those skilled in the art. In the drawings only the upper end of the blow mold 3 is indicated. In the blow mold 3 is the parison or blank 2 to be blown, the neck and lip of which is already formed. The neck and lip portion are shown in Fig. l, the lip 4: ending above the top of the blow mold 3. The blow head is carried on the usual reciprocating blow head rod 5 which is raised and lowered usually by a compressed air cylinder and piston to blow the parison into a finished bottle, as will be understood by those skilled inthiS art. Secured to the rod 5 is a hollow stem 6 upon the lower end of which is adjustably mounted the hell '3' which forms a stop or abutment engng the top of the blow mold 3. Tustean of the usual on -like air-cong' bell, the sides of the 'ell are cut away, leaving les 9 which engage the top of the blow mold The hell 7 is threaded on the stem and may be turned up or down to accommodate shorter or longer lipped bottles. The hell 7 with its legs 9 forms an adjust able abutment which engages the blow mold and positions the blow head with relation thereto. A. lock nut 8 is provided for locking the bell? in its adjusted position. The air passage 10 throh the stem terminates in a projecting tube ll which extends into the mouth of the blank to be blown. Surrounding the tube ll is a cover or washer 12 of soft fibrous non-heat-conducting material, such as asbestos The washer i2 is hacked up with a steel washer 13 which is pressed downwardly by means of a coil spri it. A collar 15 is thread@ on the lower end of? the sternand has an inwardly projecting lip 18 which engages and supports the edge of the asbwtos washer 12 against the downward pressure of the spring. The collar 15 may be turned down or up to ermit the washer 12 to yieldmore or less w en it engages the lip of the bottle. A look nut 17 serves to lockthe collar 15 in its adjusted position. The air is supplied to the blow headthiough a flexible pipe 20. The ll use et. as through the pipe 20 is ice controlled by the air valve 21. The air valve 21 is mounted on a stationary part of the machine and is arranged to be operated by a striker arm 22 moved with the blow head. The valve 21 consists ofa valve casing 23 having oppositely disposed inlet and outlet ports 24 and 25, and a reciprocating valve plun er 26 having 'an annular groove 27 whic allows the air to pass through the valve when itregisters with the ports 24: and 25. As shown in Fig. 4, the valve is open. The valve 26 is normally raised to its closed position by means of the spring 28, which is compressed by the striker 22 engaging the top of the valve stem 29 when the blow head is lowered to open the valve.

The operation of the blow head is as follows: A bottle blank or parison 2, the neck and lip of which has previously been formed, is placed in an upright position in the blow mold 3. The steps of forming the parison and its transfer to the blow mold are old in the art and need not here be described. Then the blow head 1 is brought down to blow the blank or parison into 'a" finished bottle in the blow mold. When the blow mold is lowered the bell 7 rests on top of the blow mold 3, and the asbestos cover 12 is seated firmly on top of the lip of thebottle to form a substantially air-tight seal. The spring 14 yieldingly holds the asbestos coverso as to permit slight variations in the height of the lip. The hell 7 may be adjusted for any height oflip. The collar 13 may be adjusted to vary the tension of the spring 14 or the amount which it is compressed when the asbestos cover or washer 12 engages the lip of the blank. As the blow head nears the completion of its downward movement, the

striker 22 engages thetop of thevalve stem" 29, opening the valve, 21. Upon the completion of the downwardmovement of the blow head,'the valve 26 has been depressed against the spring 28, and the groove 27 brought into registry with the ports 24 and 25, and

- the air flows throaghithe flexible pipe 20 through the air :passage 10 to blow the blank. After the blank is blown into a bottle, the blow head is raised. When the blow head is raised, the striker 22 releases the valve which is immediately closed by its It is found that this blow head makes a perfect seal on the lip of the blank to be blown, the use of the non-lieat-conducting cover or washer 12 prevents chilling of the heated lass, and the yielding of the cover 12 under t e action of the spring14 overcomes slight variations in the heightbf the lip. The blcfw. head is also readily adjustable to permit blanks having any height of ,lip to be operated upon. There are no wearing parts in the blow head, the valve being located on'the machine and o erated by the movement of the blow head, .llbis eliminates limiting its movement in one direction, substantially as described.

stantially as described.

the danger of leakage which commonly occurs in the blow heads now usually employed.

While the referred embodiment of the present invention has been specifically illustrated and described, it is to be understood that the present invention is not limited to its illustrated embodiment, but may be employed in other constructions within the scope of the following claims.

I claim:

1. A .blow head for a bottle blowing machine, comprising a blow head stem, a sealing device for engaging the lipof the bottle blank, a spring shielded from the heat of the glass by'the sealingdevice for holding the sealing device against the lip, and an abut ment for engaging the blow mold adjustably mounted on the stemto provide for different height of lips; substantially as described.

2. A blow head for a bottle blowing machine, having a sealing device movably mounted in the blow head for engaging the lip of the bottle blank to be blown, and a spring for pressing the sealing device against the 11p but permitting it to, yield with respect to the blow head; substantially "as described.

' 3. A blow head for a bottle blowing machine, comprising an abutment for engaging a blow mold, a cover for engaging the lip oi .the bottle blank, a yielding mounting for the cover permitting it to move with respect to the blow head, and'a stop for the cover for 4. A blow headior a bottle blowing machine, comprising a blow head stem having an extension entering the neck of the bottle to be blown, a sealing washer having a face of non-'heat-conducting material for engagingtheTlip ofthe bottle blank and relatively movable in relation to said stem extension, a spring for yieldingly pressing the sealing washer against the lip; substantially 'asdescribed. A

. A blow head for bottle blowing machines, compr sing a blow head stem, a seal- .ing device for engaging the lip of the bottle blank comprising a cover or washer of nonheat-conducting material, a spring for holding the cover yieldingly against the lip of the blank, and'a collar engaging the cover for limiting its movement under the action of the spring; substantially as described.

6. A blow head fora bottle blowing machine havin a sealing washer movably mounted in t e blow head for engaging the 'lipof the bottle blank to be blown, a spring for pressing the washer against the lip but permittin it to yield with respect to the blow hea and a stop carried by the blow head engaging the washer to limit its movement under. the action of the spring; sub- Laeeaeo 7. A blow head for a bottle blowing machine, comprising a sealing device for engaging the lip of the bottle blank, and a spring shielded from the heat of the glass by the sealing device for holding the sealing device against the lip to permit it to yield With respect to the blow head; substantially as described.

8. A blow head for a bottle blowing machine, comprising a sealing device movably mounted in the blow head for engaging the lip of the bottle blank, and a spring in'closed in the blow head for holding the sealing device against the lip; substantially as described.

9. A blow head fora bottle blowing machine, comprising an adjustable abutment for engaging a blow-mold, a cover for engaging the lip of a bottle blank, and a yielding mounting for the cover permitting it to move with respect to the blow head; sub stantially as described.

10. A blow head for a bottle blowing machine, comprising an adjustable abutment for engaging a blow-mold, a cover for engaging thelip of a bottle blank, a yielding mounting for the cover permitting it to move with respect to the blow head, and an adjustable stop for the cover for limiting its movement in one direction; substantially as described.

In testimony whereof, I have hereunto set my hand.

JAMES P. seem.

Witnesses:

BENJAMIN T. HEADLEY, THOMAS WHITAKER. 

